Z600 new Secure Boot Certificate

[Paul_Tikkanen]

You're very welcome.

As I posted in my first reply the the person that originally started this discussion, the 2011 and 2023 Secure Boot certificates are not applicable to the Z600, since it does not support secure boot.

So, whether or not you check that box in the Rufus app, it doesn't mean a thing to your PC.

[Challenger392]

Ok, makes sense. 

Will be giving your process a try today and see how it goes. Hoping maybe that will be a good process. 
Fingers crossed. 

[Challenger392]

Welp, got Win10 Imaged on SDD.

Installed Win11 24H2 over it with success. No boot issue.

Started installing all Win Updates here. 

Got 2024 Preview update installed with out issue.

Installed other updates.

Then got to todays 5-2026 Preview update. Got to 30% and rebooted. 

Started completing last section of update. Rebooted.

Bombed again at BIOS boot screen. Getting that Read Error. 

Tried to apply good working System Reserved and Recovery partitions from back up image. 

Starts diagnosis operations then fails and reports it can't be fixed. 

Didn't even get to try applying 25H2 on it. 

Only thing I guess to try now is a wipe of the drive and then install 25H2 from clean point with out applying over Win10. Just start a fresh install of 25H2 then see if same thing happens at WU then. 

Off and running on a clean installation of 25H2. 

[Paul_Tikkanen]

Sorry that didn't work either. 

[Challenger392]

And doing a clean install, got it installed, but once the 5-2026 updates were applied, got read error again. 

I've done enough. I don't see a path forward for the z600. Not sure why I'm seeing this but OP isn't. 

I think I'll call this and will need to get the owner new PC HW. 

It's a shame. Im out of ideas. 

[Paul_Tikkanen]

Sorry that nothing worked for you.

I'm not sure why either unless the OP doesn't have the z600 updated to 25H2.

I had to leave my HP dc7800 and Elite 8000 CMT PC's on W11 23H2 because the processors don't support SSE 4.2.

It works fine and gets the Windows antivirus definition and platform updates, Edge updates, and the Malicious software tool that PC's normally get on Patch Tuesday.

But the PC's get no security or cumulative updates to W11 because W11 23H2 has gone out of support.

You can try the W11 23H2 file and see if that works without a hitch because all OS updates ended last November.

Windows 11, version 23H2 (en-US, x64, ISO) : Microsoft : Free Download, Borrow, and Streaming : Inte...

I don't get the annoying "W11 has gone out of support" messages like you get on W10 nowadays.

Even with the W10 extended support enabled, I still get those messages on one PC I have that I won't update to W11 because it runs painfully slow on it.

It doesn't run much better on W10.

It's a HP Thin Client t630 which is not designed to run a full-blown version of Windows.

It was designed to run W7E 32 bit and W10 IoT.  Now I know why.

But I got a brand-new system including the keyboard, mouse and power supply for $65 on eBay several years ago to experiment with.

I had to buy a 250 GB M.2 SATA SSD and upgraded the memory from 4 GB to 16 GB just so it would work.

It came with a 16 GB M.2 SATA drive, which is useless to install Windows on.

[Challenger392]

Ya, not sure what is happening with this z600. 

Possible OP has different internal motherboard or the one I have maybe different, however looking at it, looks to be what it was supposed to have. BIOS FW version matches what is on HPs web site for it. 

Just seems odd that the base OS loads and boots fine, but once these updates begin, something breaks the boot sequence. What in the world could cause that. Of all the PCs I have currently, this is the only one with with out any UEFI features. I have some EliteBooks, that z210 PC, a Smart PC. All of which have some form of UEFI features, and noticed for at least 4 of these PCs they've all updated with these windows updates, I did 3 just last night and all were successful and boot correctly. Also I think some or most of these PCs since UEFI is present use GPT format. Wondering if this maybe a factor vs MBR for z600 and these updates. 

Wondering if MS may be introducing some odd issue in these updates or maybe how they are being applied or something on the MS side just breaks the boot process on a PC with no UEFI features and only legacy bios with MBR. SSD or HDD. GPT vs MBR. 

Ya I checked these PCs before setting up 24H2 or 25H2 for SSE4.2 back then when I first heard about that and I keep that as my first test. I keep CPU-ID app on hand. I do have one older Lenovo I was gifted from a customer and ya, doesn't have SSE4.2 so I only installed up to 23H2 on it. 

Ya was surprised to see that clean install of 24H2 also saw this issue. 

Seems like, at least for the z600's, these maybe problematic at best to use or build with Win11 and may need to be avoided. 

I'll get with the owner and let them know. We already discussed get them into something newer so that maybe next. I've got another z600 owner that will need to do same thing. I just hope that I can take this Win10 image and apply it to newer HP PC and build it up and not see this issue. I may try that on one of my PCs and see if it works. One thing about Windows and Intel based PCs, usually can cross use OS from one PC to another with little hassle. As long as BIOS and drivers are updated and installed. Get drive from MBR to GPT. Will maybe check on this bit later. For now I'm going to leave Win10 on it. I'll see if the owner wants 23H2. However maybe past the point, lets just get something newer. 

At least we have some info for others with a z600. Shame too. Such a good solid PC for it's time. Always loved working with them. Why I bought 640s for home. Great and solid PCs. 

Not thanks to MS for ruining my holiday weekend. 

I wish we had a good out come. 

And Thank YOU Paul for your support and information and idea. Very helpful. 

[Paul_Tikkanen]

You're very welcome.

My son has an old dell 530 PC which I installed a SSD, more memory and W11 24H2.

It has an i5-660 processor and does not have a UEFI BIOS, or support secure boot.

He never used it since I fixed it up and now, he wants to install it as a second PC to use in his basement.

So, I will test your theory out that older PC's that only support MBR partition tables may not work on the latest updates of W11 25H2.

I don't recall when I installed W11 24H2 on his PC, but it was updated at the time before I shut it down and gave it back to him.

Yes, it's a shame with perfectly good performing PCs get taken out of action by software changes.

[Challenger392]

Will be interesting to see your findings. I may play around with something else later on as well.

Was thinking about taking the current win10 image from this one z600 and putting it on a PC that has UEFI/GPT. 

See if I can get it to boot, with out UEFI enabled, first, get MBR2GPT done, then enable UEFI, then see what happens. 

Ya, why I hate the phone and pad market, and when Apple blocks older good working HW from being used. Forcing some to buy something newer. It never ends.